netns: igmp: allow IPPROTO_IGMP sockets in netns

[safe/jmp/linux-2.6] / mm / page-writeback.c

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b38f700..2970e35 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -7,7 +7,7 @@
  * Contains functions related to writing back dirty pages at the
  * address_space level.
  *
- * 10Apr2002   akpm@zip.com.au
+ * 10Apr2002   Andrew Morton
  *             Initial version
  */
 
@@ -329,9 +329,7 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
                struct zone *z =
                        &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
 
-               x += zone_page_state(z, NR_FREE_PAGES)
-                       + zone_page_state(z, NR_INACTIVE)
-                       + zone_page_state(z, NR_ACTIVE);
+               x += zone_page_state(z, NR_FREE_PAGES) + zone_lru_pages(z);
        }
        /*
         * Make sure that the number of highmem pages is never larger
@@ -355,9 +353,7 @@ unsigned long determine_dirtyable_memory(void)
 {
        unsigned long x;
 
-       x = global_page_state(NR_FREE_PAGES)
-               + global_page_state(NR_INACTIVE)
-               + global_page_state(NR_ACTIVE);
+       x = global_page_state(NR_FREE_PAGES) + global_lru_pages();
 
        if (!vm_highmem_is_dirtyable)
                x -= highmem_dirtyable_memory(x);
@@ -876,6 +872,7 @@ int write_cache_pages(struct address_space *mapping,
        pgoff_t end;            /* Inclusive */
        int scanned = 0;
        int range_whole = 0;
+       long nr_to_write = wbc->nr_to_write;
 
        if (wbc->nonblocking && bdi_write_congested(bdi)) {
                wbc->encountered_congestion = 1;
@@ -939,7 +936,7 @@ retry:
                                unlock_page(page);
                                ret = 0;
                        }
-                       if (ret || (--(wbc->nr_to_write) <= 0))
+                       if (ret || (--nr_to_write <= 0))
                                done = 1;
                        if (wbc->nonblocking && bdi_write_congested(bdi)) {
                                wbc->encountered_congestion = 1;
@@ -958,8 +955,12 @@ retry:
                index = 0;
                goto retry;
        }
-       if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
-               mapping->writeback_index = index;
+       if (!wbc->no_nrwrite_index_update) {
+               if (wbc->range_cyclic || (range_whole && nr_to_write > 0))
+                       mapping->writeback_index = index;
+               wbc->nr_to_write = nr_to_write;
+       }
+
        return ret;
 }
 EXPORT_SYMBOL(write_cache_pages);
@@ -1085,7 +1086,7 @@ int __set_page_dirty_nobuffers(struct page *page)
                if (!mapping)
                        return 1;
 
-               write_lock_irq(&mapping->tree_lock);
+               spin_lock_irq(&mapping->tree_lock);
                mapping2 = page_mapping(page);
                if (mapping2) { /* Race with truncate? */
                        BUG_ON(mapping2 != mapping);
@@ -1099,7 +1100,7 @@ int __set_page_dirty_nobuffers(struct page *page)
                        radix_tree_tag_set(&mapping->page_tree,
                                page_index(page), PAGECACHE_TAG_DIRTY);
                }
-               write_unlock_irq(&mapping->tree_lock);
+               spin_unlock_irq(&mapping->tree_lock);
                if (mapping->host) {
                        /* !PageAnon && !swapper_space */
                        __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
@@ -1255,7 +1256,7 @@ int test_clear_page_writeback(struct page *page)
                struct backing_dev_info *bdi = mapping->backing_dev_info;
                unsigned long flags;
 
-               write_lock_irqsave(&mapping->tree_lock, flags);
+               spin_lock_irqsave(&mapping->tree_lock, flags);
                ret = TestClearPageWriteback(page);
                if (ret) {
                        radix_tree_tag_clear(&mapping->page_tree,
@@ -1266,7 +1267,7 @@ int test_clear_page_writeback(struct page *page)
                                __bdi_writeout_inc(bdi);
                        }
                }
-               write_unlock_irqrestore(&mapping->tree_lock, flags);
+               spin_unlock_irqrestore(&mapping->tree_lock, flags);
        } else {
                ret = TestClearPageWriteback(page);
        }
@@ -1284,7 +1285,7 @@ int test_set_page_writeback(struct page *page)
                struct backing_dev_info *bdi = mapping->backing_dev_info;
                unsigned long flags;
 
-               write_lock_irqsave(&mapping->tree_lock, flags);
+               spin_lock_irqsave(&mapping->tree_lock, flags);
                ret = TestSetPageWriteback(page);
                if (!ret) {
                        radix_tree_tag_set(&mapping->page_tree,
@@ -1297,7 +1298,7 @@ int test_set_page_writeback(struct page *page)
                        radix_tree_tag_clear(&mapping->page_tree,
                                                page_index(page),
                                                PAGECACHE_TAG_DIRTY);
-               write_unlock_irqrestore(&mapping->tree_lock, flags);
+               spin_unlock_irqrestore(&mapping->tree_lock, flags);
        } else {
                ret = TestSetPageWriteback(page);
        }